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Zip Code 15478 — Smithfield, PA

15478 is a ZIP Code associated with Smithfield, PA, located within Fayette. The postal region supports an estimated population of 5,560 residents across Data Pending housing units, with a population density of 34.5 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (39.786010, -79.800990)

Data Metric	Local Statistic
Postal / Zip Code	15478
Primary City	Smithfield
State / Province	PA
County	Fayette
Total Population	5,560
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	34.5 people/sq mi
Timezone	America/New_York

How 15478 Compares

Metric	ZIP 15478	Fayette County	PA State Average
Population	5,560	112,816	13,018,637
Median Income	Data Pending	N/A	N/A
Population Density	34.5 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 15451	Lake Lynn	3.8 mi	675	N/A
Zip 15436	Fairchance	4.6 mi	1,750	N/A
Zip 15467	New Geneva	5.5 mi	52	N/A
Zip 15474	Point Marion	5.8 mi	2,456	N/A
Zip 15460	Martin	5.8 mi	89	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →